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Prokaryotic DNA polymerase III: A) contains a 5' → 3' proofreading activity to improve the fidelity of replication. B) does not require a primer molecule to initiate replication.C) has a β subunit that acts as a circular clamp to improve the processivity of DNA synthesis. D) synthesizes DNA in the 3' → 5' direction.E) synthesizes only the leading strand; DNA polymerase I synthesizes the lagging strand.

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